mochikit_v14/tests/test_Iter.js

   1 if (typeof(dojo) != 'undefined') { dojo.require('MochiKit.Iter'); }
   2 if (typeof(JSAN) != 'undefined') { JSAN.use('MochiKit.Iter'); }
   3 if (typeof(tests) == 'undefined') { tests = {}; }
   4
   5 tests.test_Iter = function (t) {
   6     t.is( sum([1, 2, 3, 4, 5]), 15, "sum works on Arrays" );
   7     t.is( compare(list([1, 2, 3]), [1, 2, 3]), 0, "list([x]) == [x]" );
   8     t.is( compare(list(range(6, 0, -1)), [6, 5, 4, 3, 2, 1]), 0, "list(range(6, 0, -1)");
   9     t.is( compare(list(range(6)), [0, 1, 2, 3, 4, 5]), 0, "list(range(6))" );
  10     var moreThanTwo = partial(operator.lt, 2);
  11     t.is( sum(ifilter(moreThanTwo, range(6))), 12, "sum(ifilter(, range()))" );
  12     t.is( sum(ifilterfalse(moreThanTwo, range(6))), 3, "sum(ifilterfalse(, range()))" );
  13
  14     var c = count(10);
  15     t.is( compare([c.next(), c.next(), c.next()], [10, 11, 12]), 0, "count()" );
  16     c = cycle([1, 2]);
  17     t.is( compare([c.next(), c.next(), c.next()], [1, 2, 1]), 0, "cycle()" );
  18     c = repeat("foo", 3);
  19     t.is( compare(list(c), ["foo", "foo", "foo"]), 0, "repeat()" );
  20     c = izip([1, 2], [3, 4, 5], repeat("foo"));
  21     t.is( compare(list(c), [[1, 3, "foo"], [2, 4, "foo"]]), 0, "izip()" );
  22
  23     t.is( compare(list(range(5)), [0, 1, 2, 3, 4]), 0, "range(x)" );
  24     c = islice(range(10), 0, 10, 2);
  25     t.is( compare(list(c), [0, 2, 4, 6, 8]), 0, "islice(x, y, z)" );
  26
  27     c = imap(operator.add, [1, 2, 3], [2, 4, 6]);
  28     t.is( compare(list(c), [3, 6, 9]), 0, "imap(fn, p, q)" );
  29
  30     c = filter(partial(operator.lt, 1), iter([1, 2, 3]));
  31     t.is( compare(c, [2, 3]), 0, "filter(fn, iterable)" );
  32
  33     c = map(partial(operator.add, -1), iter([1, 2, 3]));
  34     t.is( compare(c, [0, 1, 2]), 0, "map(fn, iterable)" );
  35
  36     c = map(operator.add, iter([1, 2, 3]), [2, 4, 6]);
  37     t.is( compare(c, [3, 6, 9]), 0, "map(fn, iterable, q)" );
  38
  39     c = map(operator.add, iter([1, 2, 3]), iter([2, 4, 6]));
  40     t.is( compare(c, [3, 6, 9]), 0, "map(fn, iterable, iterable)" );
  41
  42     c = applymap(operator.add, [[1, 2], [2, 4], [3, 6]]);
  43     t.is( compare(list(c), [3, 6, 9]), 0, "applymap()" );
  44
  45     c = applymap(function (a) { return [this, a]; }, [[1], [2]], 1);
  46     t.is( compare(list(c), [[1, 1], [1, 2]]), 0, "applymap(self)" );
  47
  48     c = chain(range(2), range(3));
  49     t.is( compare(list(c), [0, 1, 0, 1, 2]), 0, "chain(p, q)" );
  50
  51     var lessThanFive = partial(operator.gt, 5);
  52     c = takewhile(lessThanFive, count());
  53     t.is( compare(list(c), [0, 1, 2, 3, 4]), 0, "takewhile()" );
  54
  55     c = dropwhile(lessThanFive, range(10));
  56     t.is( compare(list(c), [5, 6, 7, 8, 9]), 0, "dropwhile()" );
  57
  58     c = tee(range(5), 3);
  59     t.is( compare(list(c[0]), list(c[1])), 0, "tee(..., 3) p0 == p1" );
  60     t.is( compare(list(c[2]), [0, 1, 2, 3, 4]), 0, "tee(..., 3) p2 == fixed" );
  61
  62     t.is( compare(reduce(operator.add, range(10)), 45), 0, "reduce(op.add)" );
  63
  64     try {
  65         reduce(operator.add, []);
  66         t.ok( false, "reduce didn't raise anything with empty list and no start?!" );
  67     } catch (e) {
  68         if (e instanceof TypeError) {
  69             t.ok( true, "reduce raised TypeError correctly" );
  70         } else {
  71             t.ok( false, "reduce raised the wrong exception?" );
  72         }
  73     }
  74
  75     t.is( reduce(operator.add, [], 10), 10, "range initial value OK empty" );
  76     t.is( reduce(operator.add, [1], 10), 11, "range initial value OK populated" );
  77
  78     t.is( compare(iextend([1], range(2)), [1, 0, 1]), 0, "iextend(...)" );
  79
  80     var x = [];
  81     exhaust(imap(bind(x.push, x), range(5)));
  82     t.is( compare(x, [0, 1, 2, 3, 4]), 0, "exhaust(...)" );
  83
  84     t.is( every([1, 2, 3, 4, 5, 4], lessThanFive), false, "every false" );
  85     t.is( every([1, 2, 3, 4, 4], lessThanFive), true, "every true" );
  86     t.is( some([1, 2, 3, 4, 4], lessThanFive), true, "some true" );
  87     t.is( some([5, 6, 7, 8, 9], lessThanFive), false, "some false" );
  88     t.is( some([5, 6, 7, 8, 4], lessThanFive), true, "some true" );
  89
  90     var rval = [];
  91     forEach(range(2), rval.push, rval);
  92     t.is( compare(rval, [0, 1]), 0, "forEach works bound" );
  93
  94     function foo(o) {
  95         rval.push(o);
  96     }
  97     forEach(range(2), foo);
  98     t.is( compare(rval, [0, 1, 0, 1]), 0, "forEach works unbound" );
  99
 100     t.is( compare(sorted([3, 2, 1]), [1, 2, 3]), 0, "sorted default" );
 101     rval = sorted(["aaa", "bb", "c"], keyComparator("length"));
 102     t.is(compare(rval, ["c", "bb", "aaa"]), 0, "sorted custom");
 103
 104     t.is( compare(reversed(range(4)), [3, 2, 1, 0]), 0, "reversed iterator" );
 105     t.is( compare(reversed([5, 6, 7]), [7, 6, 5]), 0, "reversed list" );
 106
 107     var o = {lst: [1, 2, 3], iterateNext: function () { return this.lst.shift(); }};
 108     t.is( compare(list(o), [1, 2, 3]), 0, "iterateNext" );
 109
 110
 111     function except(exc, func) {
 112         try {
 113             func();
 114             t.ok(false, exc.name + " was not raised.");
 115         } catch (e) {
 116             if (e == exc) {
 117                 t.ok( true, "raised " + exc.name + " correctly" );
 118             } else {
 119                 t.ok( false, "raised the wrong exception?" );
 120             }
 121         }
 122     }
 123
 124     odd = partial(operator.and, 1)
 125
 126     // empty
 127     grouped = groupby([]);
 128     except(StopIteration, grouped.next);
 129
 130     // exhaust sub-iterator
 131     grouped = groupby([2,4,6,7], odd);
 132     kv = grouped.next(); k = kv[0], subiter = kv[1];
 133     t.is(k, 0, "odd(2) = odd(4) = odd(6) == 0");
 134     t.is(subiter.next(), 2, "sub-iterator.next() == 2");
 135     t.is(subiter.next(), 4, "sub-iterator.next() == 4");
 136     t.is(subiter.next(), 6, "sub-iterator.next() == 6");
 137     except(StopIteration, subiter.next);
 138     kv = grouped.next(); key = kv[0], subiter = kv[1];
 139     t.is(key, 1, "odd(7) == 1");
 140     t.is(subiter.next(), 7, "sub-iterator.next() == 7");
 141     except(StopIteration, subiter.next);
 142
 143     // not consume sub-iterator
 144     grouped = groupby([2,4,6,7], odd);
 145     kv = grouped.next(); key = kv[0], subiter = kv[1];
 146     t.is(key, 0, "0 = odd(2) = odd(4) = odd(6)");
 147     kv = grouped.next(); key = kv[0], subiter = kv[1];
 148     t.is(key, 1, "1 = odd(7)");
 149     except(StopIteration, grouped.next);
 150
 151     // consume sub-iterator partially
 152     grouped = groupby([3,1,1,2], odd);
 153     kv = grouped.next(); key = kv[0], subiter = kv[1];
 154     t.is(key, 1, "odd(1) == 1");
 155     t.is(subiter.next(), 3, "sub-iterator.next() == 3");
 156     kv = grouped.next(); key = kv[0], v = kv[1];
 157     t.is(key, 0, "skip (1,1),  odd(2) == 0");
 158     except(StopIteration, grouped.next);
 159
 160     // null
 161     grouped = groupby([null,null]);
 162     kv = grouped.next(); k = kv[0], v = kv[1];
 163     t.is(k, null, "null ok");
 164
 165     // groupby - array version
 166     isEqual = (t.isDeeply || function (a, b, msg) {
 167         return t.ok(compare(a, b) == 0, msg);
 168     });
 169     isEqual(groupby_as_array([ ]    ), [                        ], "empty");
 170     isEqual(groupby_as_array([1,1,1]), [ [1,[1,1,1]]            ], "[1,1,1]: [1,1,1]");
 171     isEqual(groupby_as_array([1,2,2]), [ [1,[1]    ], [2,[2,2]] ], "[1,2,2]: [1], [2,2]");
 172     isEqual(groupby_as_array([1,1,2]), [ [1,[1,1]  ], [2,[2  ]] ], "[1,1,2]: [1,1], [2]");
 173     isEqual(groupby_as_array([null,null] ), [ [null,[null,null]] ], "[null,null]: [null,null]");
 174     grouped = groupby_as_array([1,1,3,2,4,6,8], odd);
 175     isEqual(grouped, [[1, [1,1,3]], [0,[2,4,6,8]]], "[1,1,3,2,4,6,7] odd: [1,1,3], [2,4,6,8]");
 176 };